Vobfus.CM

It carries out damaging actions on the affected computer.
It affects the productivity of the computer, the network to which it’s connected or other remote sites.
It uses stealth techniques to avoid being detected by the user.
It spreads
, across the Internet, via mapped drives, through shared network resources, by infecting files that are then distributed.

Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:

Jan. 27, 2010

Detection updated on:

Jan. 27, 2010

Statistics

No

Brief Description

Vobfus.CM is a virus that spreads to other computers by copying its code to other files or programs.

It affects productivity, preventing tasks from being carried out:

In the affected computer:
it displays pop-up windows; causes system slowdowns.

In the local network:
it generates a large amount of network activity and consumes bandwidth.

It uses stealth techniques to avoid being detected by the user:

It uses techniques included in its code to hide itself while it is active.

It injects itself in running processes.

It deletes the original file from which it was run once it is installed on the computer.

It modifies system permissions in order to hide itself.

Vobfus.CM uses the following propagation or distribution methods:

Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.

Via Internet, exploiting remote vulnerabilities: attacking random IP addresses, in which it tries to insert a copy of itself by exploiting one or more vulnerabilities.

Resident: once it has been run, the virus goes memory resident and stops functions belonging to the operating system. Therefore, every time the operating system or an application tries to access any of these functions, the virus will activate and infect new files.